Fan volute structure for breathing machine

Abstract

The utility model relates to the technical field of breathing machine fans, in particular to a fan volute structure for a breathing machine. The volute structure comprises an outer shell, a driving mechanism and a control part, the outer shell comprises an upper shell body and a lower shell body which are in butt joint, an air inlet is formed in the upper shell body, the upper shell body and the lower shell body are in butt joint, an air outlet is formed in one end of the outer shell body, an air cavity for communicating the air inlet and the air outlet is formed in the outer shell body, and the upper shell body is arranged in a concentric circle; the lower shell is not arranged in a concentric circle; the driving mechanism comprises a motor shell, a driving assembly, a fan blade piece and a first lower end cover, one end of the motor shell penetrates through the lower shell, the driving assembly is located in the motor shell, the rotating shaft is exposed out of the motor shell and connected with the fan blade piece, the fan blade piece is located in the air cavity, and the first lower end cover abuts against the motor shell and is connected with the lower shell; the control piece is contained in the first lower end cover, electrically connected with the driving assembly and externally connected with a power source. Efficient airflow conduction can be achieved, and the noise of the fan can be reduced.

Description

Technical Field

[0001] This application relates to the field of ventilator fan technology, and in particular to a fan volute structure for a ventilator. Background Technology

[0002] Fan volutes are widely used in medical equipment such as ventilators, and their main function is to guide airflow and improve fan efficiency. With the development of medical technology, the performance requirements for ventilators are constantly increasing, especially in terms of noise reduction and airflow performance. A high-efficiency fan volute can not only significantly improve the working efficiency of the ventilator, but also effectively reduce the noise generated during operation, thereby improving patient comfort and treatment outcomes. Optimizing the design of the fan volute has become a key aspect of improving the overall performance of ventilators.

[0003] However, existing fan casing structures still have shortcomings in reducing noise and improving airflow performance. They cannot simultaneously meet the requirements of noise reduction and increased airflow performance, leading to significant noise generation and limited operating efficiency at high airflow output. Therefore, a novel fan casing structure that can effectively solve these problems is urgently needed. Utility Model Content

[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide a fan volute structure for a ventilator, adopting the following solution:

[0005] A fan housing structure for a ventilator includes: an outer shell comprising an upper shell and a lower shell joined together, the upper shell having an air inlet, the upper shell and the lower shell being joined together and having an air outlet formed at one end of the outer shell, and an air cavity formed within the outer shell to connect the air inlet and the air outlet, the upper shell being concentrically arranged and the lower shell not being concentrically arranged; a drive mechanism including an inner shell, a drive assembly, and fan blades, the inner shell including an integral motor housing and a first lower end cover, one end of the motor housing passing through the lower shell, the drive assembly located within the motor housing with its shaft exposed, the motor housing connecting to the fan blades, the fan blades located within the air cavity, and the first lower end cover abutting against the motor housing and connecting to the lower shell; and a control component housed within the first lower end cover, electrically connected to the drive assembly and connected to an external power source.

[0006] By adopting the above technical solution, the fan volute structure achieves efficient airflow and reduces fan noise. The specific effects are as follows: The outer casing is formed by the joining of an upper and lower casing. The upper casing has an air inlet, and the lower casing mates with the motor housing and is connected via a first lower end cover, forming a complete fan volute structure. The upper casing is concentrically arranged, while the lower casing is not. This design optimizes the airflow path within the air cavity, reduces airflow resistance, and improves airflow efficiency. The motor housing in the drive mechanism passes through the lower casing, and the exposed shaft of the drive assembly connects to the fan blades, driving the blades to rotate within the air cavity to achieve airflow and improve power transmission efficiency. The first lower end cover abuts against the motor housing and connects to the lower casing, enhancing structural stability and providing reliable installation space for the control components. The control components are housed within the first lower end cover and electrically connected to the drive assembly, enabling precise control of the drive assembly. Furthermore, the external power supply design facilitates power management for the entire device.

[0007] Optionally, it further includes: a second lower end cover for covering the control component and fixed to the first lower end cover, wherein the first lower end cover has an accommodating space for accommodating the control component, and the accommodating space passes through the motor housing so that the control component can be electrically connected to the drive assembly, and the first lower end cover has a slot for accommodating an external power supply for the control component.

[0008] By adopting the above technical solution, and by adding a second lower end cover to the control component and fixing it to the first lower end cover, the control component can be effectively protected from the influence of the external environment, thus improving the reliability of the overall structure. The design of the accommodating space not only provides an installation position for the control component but also ensures a smooth electrical connection between the control component and the drive assembly. The slotted design facilitates the connection of the control component to an external power supply, simplifies wiring operations, and improves assembly efficiency.

[0009] Optionally, the drive assembly includes an iron core and a wire frame. The iron core is sleeved on the wire frame, and the wire frame is sleeved on the rotating shaft. The end of the wire frame away from the fan blade has multiple protrusions. The control component is provided with multiple through holes, and the multiple protrusions pass through the accommodating space and are inserted into the multiple through holes to fix the control component.

[0010] By adopting the above technical solution, the drive component in the wind turbine volute structure consists of an iron core and a wire frame. The iron core is sleeved on the wire frame, and the wire frame is sleeved on the rotating shaft. This structural design can effectively improve the stability and transmission efficiency of the drive component. Simultaneously, multiple protrusions are provided at the end of the wire frame away from the wind blades, and multiple through holes are provided on the control component. The protrusions pass through the accommodating space and through the through holes to fix the control component. This design achieves a reliable connection between the control component and the drive component, simplifies the assembly process, and improves the compactness and stability of the overall structure.

[0011] Optionally, the lower housing has a protruding edge at the end away from the upper housing, and the end of the first lower end cover away from the second lower end cover forms a groove space with the motor housing for the protruding edge to be inserted.

[0012] By adopting the above technical solution, the connection between the lower housing and the first lower end cover is more stable and reliable. Specifically, the convex edge provided at one end of the lower housing can be inserted into the groove space formed by the first lower end cover and the motor housing, thereby achieving precise positioning and effective fixation, preventing loosening or displacement during use, and improving the stability and assembly accuracy of the overall structure.

[0013] Optionally, the first lower end cover and the lower housing are provided with fixing holes on their outer peripheral sides, so that screws can be sequentially inserted to fix the first lower end cover and the lower housing.

[0014] By adopting the above technical solution, the first lower end cover and the lower housing are fixedly connected by fixing holes on the outer periphery and screws, which can improve the stability of the structure and the reliability of the assembly, ensure the tight connection between the drive mechanism and the outer housing, prevent loosening or displacement during use, and thus ensure the overall performance and safety of the fan volute structure.

[0015] Optionally, the fan blade is provided with a plurality of first air guide plates and a plurality of second air guide plates at intervals. The front end of the first air guide plate is located at the air inlet and the rear end extends to the edge of the fan blade. The second air guide plate is located at the rear end of the first air guide plate and is located between the two first air guide plates. The distance between the front ends of the two first air guide plates is less than the distance between the rear ends of the two first air guide plates.

[0016] By adopting the above technical solution, the specific layout of the first and second air guide vanes on the fan blades can effectively improve the airflow guiding efficiency. Specifically, the first air guide vane extends from the front end at the air inlet to the edge of the fan blades, helping to smoothly guide the incoming airflow into the air cavity and reducing turbulence during airflow entry. The second air guide vane is positioned between the two first air guide vanes, further optimizing the airflow distribution and making the airflow within the air cavity more uniform. In addition, the design that the distance between the front ends of the two first air guide vanes is smaller than the distance between their rear ends can create a certain convergence effect at the air cavity inlet, enhancing the concentration of airflow and thus improving the overall performance and efficiency of the fan.

[0017] Optionally, a tooth and a stop are sequentially provided on the end of the rotating shaft away from the first lower end cover. The fan blade engages with the rotating shaft via the tooth and is blocked by the stop.

[0018] By adopting the above technical solutions, the connection between the fan blades and the shaft is more stable and reliable. Specifically, the meshing design allows the fan blades to precisely mesh with the shaft, thereby ensuring stability during transmission and reducing energy loss and vibration. The baffle effectively prevents axial displacement of the fan blades during operation, further improving the reliability of the structure.

[0019] Optionally, sealing rings are fitted on both ends of the drive assembly.

[0020] By adopting the above technical solution, the sealing ring can effectively improve the sealing performance between the drive component and the surrounding structure, reduce the possibility of gas leakage, and thus improve the overall airtightness of the wind turbine casing structure. Furthermore, the sealing ring can also reduce the risk of external impurities entering the drive component, enhancing the stability and service life of the structure.

[0021] Optionally, the upper housing is provided with a plurality of vibration damping protrusions around its outer periphery.

[0022] By adopting the above technical solution, multiple vibration damping ridges are arranged around the outer periphery of the upper casing, which can effectively reduce the vibration generated by the fan volute during operation, reduce the noise caused by vibration, and improve the stability and service life of the overall structure.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By designing the upper shell as a concentric circle structure and the lower shell as a non-concentric circle structure, combined with the optimized design of the air cavity, the airflow path is effectively guided, significantly improving airflow performance and reducing noise caused by airflow turbulence;

[0025] 2. The proper fit between the motor housing and the lower housing in the drive mechanism, as well as the precise positioning of the fan blades in the air cavity, ensures efficient and stable operation of the fan while reducing operating noise;

[0026] 3. The control components are housed within the first lower end cover and electrically connected, simplifying the structural layout, improving overall assembly efficiency, and enhancing the reliability and stability of the system. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the fan volute structure for a ventilator disclosed in an embodiment of this application;

[0028] Figure 2 This is a cross-sectional schematic diagram of the fan volute structure for a ventilator disclosed in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the exploded structure of the fan volute structure for a ventilator disclosed in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of a partial exploded structure of the fan volute structure for a ventilator disclosed in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of a partial exploded structure of the fan volute structure for a ventilator disclosed in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Outer shell; 11. Upper shell; 111. Air inlet; 112. Vibration damping ridge; 12. Lower shell; 121. Raised edge; 122. Fixing hole; 13. Air outlet; 14. Air cavity; 20. Drive mechanism; 21. Inner shell; 211. Motor shell; 212. First lower end cover; 2121. Accommodation space; 2122. Slot; 213. Groove space; 22. Drive assembly; 221. Shaft; 2211. Gear; 2212. Stop; 222. Iron core; 223. Wire frame; 2231. Protrusion; 23. Fan blade; 231. First air guide plate; 232. Second air guide plate; 24. Sealing ring; 30. Control component; 31. Through hole; 40. Second lower end cover. Detailed Implementation

[0034] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0035] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0036] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0037] See Figure 1 and Figure 2 The present application discloses a fan volute structure for a ventilator, comprising: an outer shell 10, a drive mechanism 20, and a control component 30.

[0038] See Figure 2 andFigure 3 The outer casing 10 is composed of an upper casing 11 and a lower casing 12 that are joined together. The upper casing 11 is provided with an air inlet 111. The upper casing 11 and the lower casing 12 are joined together, forming an air outlet 13 at one end, and a ventilation cavity 14 is formed inside the outer casing 10. The upper casing 11 is arranged in concentric circles, while the lower casing 12 is not arranged in concentric circles, which increases the space of the air outlet 13. This increases the air volume while reducing the air pressure at the air outlet 13, thereby reducing the wind noise of the air outlet.

[0039] The drive mechanism 20 includes an inner housing 21, a drive assembly 22, and a fan blade 23. The inner housing 21 includes an integral motor housing 211 and a first lower end cover 212. One end of the motor housing 211 passes through the lower housing 12. The drive assembly 22 is located inside the motor housing 211, and the rotating shaft 221 inside the drive assembly 22 is exposed outside the motor housing 211 to connect to the fan blade 23. The fan blade 23 is located in the air cavity 14, fixed to one end of the rotating shaft 221, and rotates by rotating the rotating shaft 221 to guide the airflow from the air inlet 111 to the air outlet 13. The first lower end cover 212 abuts against one end of the motor housing 211 and is connected to the lower housing 12, realizing a stable connection between the first lower end cover 212, the motor housing 211, and the lower housing 12. The control component 30 is housed in the first lower end cover 212, electrically connected to the drive assembly 22, and connected to an external power source, realizing the control of the drive assembly 22 to drive the fan blade 23 to rotate, thereby realizing the output of air volume.

[0040] Specifically, the upper housing 11 and the lower housing 12 are provided with mating slots, and screw holes for screws to pass through are provided on their peripheral edges, so as to achieve tight mating and fixation of the two. The upper housing 11 is arranged in concentric circles, which helps to distribute airflow evenly, while the lower housing 12 is not arranged in concentric circles, which can adjust the airflow path and airflow pressure, and reduce eddies and noise.

[0041] See Figure 3 and Figure 4 The motor housing 211 can be made of high-strength plastic or metal, such as nylon 66 or aluminum alloy, which has good mechanical properties and heat dissipation capabilities. The drive assembly 22 includes an iron core 222 and a wire frame 223. The iron core 222 can be a neodymium iron boron core 222, and the wire frame 223 can be made of copper wire. The iron core 222 is sleeved on the wire frame 223, and the wire frame 223 is sleeved on the rotating shaft 221. In this way, the iron core 222 and the wire frame 223 achieve high-efficiency transmission through the sleeved cooperation.

[0042] See Figure 4 and Figure 5Multiple protrusions 2231 are provided at the end of the wire frame 223 away from the fan blade 23, and multiple through holes 31 are provided on the control component 30. The multiple protrusions 2231 of the wire frame 223 pass through the accommodating space 2121 and are inserted into the multiple through holes 31 to fix the control component 30, so as to facilitate the assembly and fixation of the two.

[0043] The fan blade component 23 is made of engineering plastics, such as polyoxymethylene or polyamide, which has wear-resistant and impact-resistant properties. Multiple first air guide vanes 231 and multiple second air guide vanes 232 are spaced apart on the fan blade component 23. The front end of the first air guide vane 231 is located at the air inlet 111, and the rear end extends to the edge of the fan blade component 23. The second air guide vanes 232 are located at the rear end of the first air guide vanes 231 and between the two first air guide vanes 231. The distance between the front ends of the two first air guide vanes 231 is less than the distance between their rear ends. This design helps optimize airflow guidance and reduce noise.

[0044] In order to increase the robustness of the fan blade 23, a tooth 2211 and a stop 2212 are sequentially provided on the end of the shaft 221 of the drive assembly 22 away from the first lower end cover 212. The fan blade 23 engages with the shaft 221 through the tooth 2211 and is blocked by the stop 2212 to ensure connection reliability and transmission efficiency.

[0045] See Figure 5 The first lower end cover 212 can be made of metal, such as stainless steel or aluminum alloy, which has high strength and corrosion resistance, and is fixed to the lower housing 12 by screws.

[0046] See Figure 3 and Figure 5 Fixing holes 122 are provided opposite to each other on the outer periphery of the first lower end cover 212 and the lower housing 12, so that screws can be passed through to fix the first lower end cover 212 and the lower housing 12 in sequence, which enhances the firmness of the connection. It is worth mentioning that a protruding edge 121 is provided on the end of the lower housing 12 away from the upper housing 11. The first lower end cover 212 and the motor housing 211 form a groove space 213 for the protruding edge 121 to be inserted. This design improves the compactness of the structure and the convenience of installation.

[0047] See Figure 3 and Figure 5 The fan casing structure also includes a second lower end cover 40, which is used to cover the control component 30 and is fixed to the first lower end cover 212.

[0048] The first lower end cover 212 includes a receiving space 2121 for accommodating the control component 30, which extends through the motor housing 211 for electrical connection of the control component 30 to the drive assembly 22. A slot 2122 is provided on the first lower end cover 212 for connecting the control component 30 to an external power source. In this embodiment, the addition of a second lower end cover 40 effectively protects the control component 30 from external environmental influences, improving system reliability. Optimizing the structural design of the first lower end cover 212 facilitates the installation and maintenance of the control component 30, enhancing operational convenience.

[0049] See Figure 4 To enhance the sealing of the drive mechanism 20, sealing rings 24 are fitted on both ends of the drive assembly 22 to abut against the inside of the motor housing 211 and the first lower end cover 212, respectively. This prevents dust and moisture from entering and extends the service life.

[0050] See Figure 3 Multiple vibration damping protrusions 112 are provided on the outer peripheral surface of the upper housing 11. This design can effectively reduce vibration transmission and reduce operating noise.

[0051] In summary, the fan volute structure for a ventilator disclosed in this application combines a concentric circle design for the upper housing 11 with a non-concentric circle design for the lower housing 12, optimizing the airflow direction within the air cavity 14 and effectively reducing airflow turbulence. This significantly reduces noise while increasing airflow output. The drive mechanism 20, through precise docking between the motor housing 211 and the lower housing 12, and the reasonable arrangement of the fan blades 23 within the air cavity 14, ensures smoother airflow guidance, improving the overall operating efficiency and stability of the fan. The control component 30 is housed within the first lower end cover 212 and electrically connected to the drive assembly 22 via the accommodating space 2121, simplifying the internal structure, improving assembly convenience, and enhancing the system's compactness and reliability.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A fan volute structure for a ventilator, characterized in that, include: The outer shell (10) includes an upper shell (11) and a lower shell (12) that are joined together. An air inlet (111) is provided on the upper shell (11). The upper shell (11) and the lower shell (12) are joined together and an air outlet (13) is formed at one end of the outer shell (10). An air cavity (14) is formed in the outer shell (10) to conduct the air inlet (111) and the air outlet (13). The upper shell (11) is arranged in concentric circles, while the lower shell (12) is not arranged in concentric circles. The drive mechanism (20) includes an inner housing (21), a drive assembly (22), and a fan blade (23). The inner housing (21) includes an integral motor housing (211) and a first lower end cover (212). One end of the motor housing (211) passes through the lower housing (12). The drive assembly (22) is located inside the motor housing (211), and the rotating shaft (221) is exposed outside the motor housing (211) and connected to the fan blade (23). The fan blade (23) is located in the air cavity (14). The first lower end cover (212) abuts against the motor housing (211) and connects to the lower housing (12). The control unit (30) is housed within the first lower end cover (212), electrically connected to the drive assembly (22), and connected to an external power source.

2. The fan volute structure for a ventilator according to claim 1, characterized in that, Also includes: The second lower end cover (40) is used to cover the control component (30) and is fixed to the first lower end cover (212). The first lower end cover (212) is provided with a receiving space (2121) for accommodating the control component (30), and the receiving space (2121) passes through the motor housing (211) so that the control component (30) can be electrically connected to the drive assembly (22). A slot (2122) is provided on the first lower end cover (212) for connecting the control component (30) to an external power source.

3. The fan volute structure for a ventilator according to claim 2, characterized in that, The drive assembly (22) includes an iron core (222) and a wire frame (223). The iron core (222) is sleeved on the wire frame (223), and the wire frame (223) is sleeved on the rotating shaft (221). The end of the wire frame (223) away from the fan blade (23) has multiple protrusions (2231). The control component (30) is provided with multiple through holes (31). The multiple protrusions (2231) pass through the accommodating space (2121) and are inserted into the multiple through holes (31) to fix the control component (30).

4. The fan volute structure for a ventilator according to claim 2, characterized in that, The lower housing (12) has a protruding edge (121) at one end away from the upper housing (11), and the first lower end cover (212) forms a groove space (213) with the motor housing (211) at one end away from the second lower end cover (40) for the protruding edge (121) to be inserted.

5. The fan casing structure for a ventilator according to claim 2, characterized in that, The first lower end cover (212) and the lower housing (12) are provided with fixing holes (122) on their outer peripheral sides, so that screws can be inserted and fixed in sequence to fix the first lower end cover (212) and the lower housing (12).

6. The fan volute structure for a ventilator according to claim 2, characterized in that, The fan blade (23) is provided with a plurality of first air guide plates (231) and a plurality of second air guide plates (232) spaced apart. The front end of the first air guide plate (231) is located at the air inlet (111) and the rear end extends to the edge of the fan blade (23). The second air guide plate (232) is located at the rear end of the first air guide plate (231) and is located between the two first air guide plates (231). The distance between the front ends of the two first air guide plates (231) is less than the distance between the rear ends of the two first air guide plates (231).

7. The fan volute structure for a ventilator according to claim 2, characterized in that, The shaft (221) is provided with a tooth (2211) and a stop (2212) in sequence at the end away from the first lower end cover (212). The fan blade (23) engages with the shaft (221) through the tooth (2211) and is blocked by the stop (2212).

8. The fan volute structure for a ventilator according to claim 1, characterized in that, Sealing rings (24) are fitted on both ends of the drive assembly (22).

9. The fan casing structure for a ventilator according to claim 1, characterized in that, The upper housing (11) is surrounded by multiple vibration damping protrusions (112).

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